Quantum walks and wavepacket dynamics on a lattice with twisted photons

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Author(s)
Cardano, Filippo
Massa, Francesco
Qassim, Hammam
Karimi, Ebrahim
Slussarenko, Sergei
Paparo, Domenico
de Lisio, Corrado
Sciarrino, Fabio
Santamato, Enrico
Boyd, Robert W
Marrucci, Lorenzo
Griffith University Author(s)
Year published
2015
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Show full item recordAbstract
The “quantum walk” has emerged recently as a paradigmatic process for the dynamic simulation of complex
quantum systems, entanglement production and quantum computation. Hitherto, photonic implementations
of quantum walks have mainly been based on multipath interferometric schemes in real space. We report the
experimental realization of a discrete quantum walk taking place in the orbital angular momentum space of
light, both for a single photon and for two simultaneous photons. In contrast to previous implementations, the
whole process develops in a single light beam, with no need of interferometers; it requires optical ...
View more >The “quantum walk” has emerged recently as a paradigmatic process for the dynamic simulation of complex quantum systems, entanglement production and quantum computation. Hitherto, photonic implementations of quantum walks have mainly been based on multipath interferometric schemes in real space. We report the experimental realization of a discrete quantum walk taking place in the orbital angular momentum space of light, both for a single photon and for two simultaneous photons. In contrast to previous implementations, the whole process develops in a single light beam, with no need of interferometers; it requires optical resources scaling linearly with the number of steps; and it allows flexible control of input and output superposition states. Exploiting the latter property, we explored the system band structure in momentum space and the associated spin-orbit topological features by simulating the quantum dynamics of Gaussian wavepackets. Our demonstration introduces a novel versatile photonic platform for quantum simulations.
View less >
View more >The “quantum walk” has emerged recently as a paradigmatic process for the dynamic simulation of complex quantum systems, entanglement production and quantum computation. Hitherto, photonic implementations of quantum walks have mainly been based on multipath interferometric schemes in real space. We report the experimental realization of a discrete quantum walk taking place in the orbital angular momentum space of light, both for a single photon and for two simultaneous photons. In contrast to previous implementations, the whole process develops in a single light beam, with no need of interferometers; it requires optical resources scaling linearly with the number of steps; and it allows flexible control of input and output superposition states. Exploiting the latter property, we explored the system band structure in momentum space and the associated spin-orbit topological features by simulating the quantum dynamics of Gaussian wavepackets. Our demonstration introduces a novel versatile photonic platform for quantum simulations.
View less >
Journal Title
Science Advances
Volume
1
Issue
2
Copyright Statement
© The Authors 2015 American Association for
the Advancement of Science. Distributed
under a Creative Commons Attribution
NonCommercial License 4.0 (CC BY-NC).
Subject
Quantum Optics
Quantum Information, Computation and Communication